OK everyone, I Just want to confirm some info, and make sure I'm not missing anything or what not... As well as have all the info here for anyone else considering this. On an 2006 A3 8P Quattro Sportback, the standard wheels are: 17" x 7.5" ET56 PCD112 - 225x45 R17 Tyres The FRONT / REAR Track is: 1531mm / 1515mm (See Below) This equates to a noticeable 16mm difference (skinnier) at the rear of the car. If I wanted: 18" x 8" ETxx PCD112 - 225x40 R18 Tyres I'm planning on staggering the offset to make the wheels the same track front and rear. (See below) You will note the BLUE underlined dimensions. If you calculate the difference, you 14mm (7mm per side). Referring back to the original track specifications, If I use this setup, I will reduce my track difference down to 2mm. (1mm per side) This is not noticeable. (See Below for Visual diagram) So, some points/questions: 1. The use of wheel spacers is illegal in Australia. They are NOT an option here. 2. If you're wondering why not just get a ET39/45 setup or a ET38/44 setup to get a perfectly even track from front to rear. I believe the ET's I have selected are easier to get. anyone agree/disagree? 3. Being that the rim width is not staggered, I can maintain the same rolling diameter front to rear with the same tyres used all round. (Haldex SAFE) 4. Will changing the track dimensions affect the Haldex at all? At an educated guess, I assume not, but would like confirmation if I can? (Best to ask and be told, than not to ask and break something) 5. Can anyone confirm this setup will work? (Based on Guard spacing, etc) All I would need is someone who is running ET45's to confirm the front doesn't rub and someone running ET38's to confirm the rear doesn't rub. (With 8" wide rims running 225/40/R18 tyres) 6. I'm Currently running standard springs. Assuming this works now. Would this work at lower ride heights? (Please note the bonus of strut tower clearance in both offsets of 4.7mm and 11.7mm greater above the standard wheel clearance) 7. This setup will give me more options for brake upgrades, due to the increased offset? (The standard A3 has shocking BBK clearance) 8. Would I get greater handling/cornering from both the increased tyre width and greater overall track width setup? (Not considering suspension setups, that's a whole different discussion) 9. I understand this setup removes the ability to rotate wheels around the car to promote even tyre wear. But, in saying that, the Haldex Diff will work safely with a certain % Difference in rolling diameter to compensate for tyre wear. So If you put brand new tyres on the front and leave say, 60% worn tyres on the back. (Or vice-versa) It Shouldn't affect it. Agree/Disagree? Thanks in advance.